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References
-Anthony Aust, Modern Treaty law and Practice, Cambridge University Press, 2000.
-Jan Klabbers, The Concept of International Law, Martinus Nijhoff Publisher, 1996
-John O’Brien, International law, Routledge Cavendish, 2001
-Rudiger Wolfrum and Volker Roben, Development of International Law in Treaty Making Process, Springerm 2005.
-Vienna Convention on the Law of Treaties, 1969
-Charter of the Association of Southeast Asian Nation